Anisotropy of Surface Self-Diffusion on Ni(110)

The theoretically expected directional anisotropy of surface self-diffusion was experimentally verified for a clean Ni(110) surface. The diffusion coefficients were determined by the sinusoidal profile decay technique at 800°C in [001] and [$1\overline{1}0$] directions as 2.2 × ${10}^{-7\mathrm{}}$ ${\mathrm{cm}}^2$ ${\sec }^{-1\mathrm{}}$ and 3.0 × ${10}^{-6\mathrm{}}$ ${\mathrm{cm}}^2$ ${\sec }^{-1\mathrm{}}$, respectively. The cleanliness and structural integrity of the Ni(110) surface were checked with Auger spectroscopy and low-energy electron diffraction, respectively.